Textiles: fiber preparation – Assembling – Formed silvers
Patent
1993-05-21
1998-04-14
Crowder, Clifford D.
Textiles: fiber preparation
Assembling
Formed silvers
D04H 1100
Patent
active
057378070
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a spinning plant preparation machine with a rotary plate for the depositing of fiber slivers in spinning cans. The rotary plate rotates around its vertical axis and delivers the fiber sliver via an eccentrically located outlet of a sliver guiding channel in cycloidal loops into a rotating spinning can.
As the spinning can fills up, the forming fiber sliver mushroom presses against the rotary plate. The fiber sliver compression increases through the rotary plate as a function of the degree of fullness of the can. Friction occurs between the lower surface of the rotary plate and the fiber sliver filling the spinning can pressed against this lower surface. A faultless lower surface of the rotary plate is necessary so that the fiber sliver may not be damaged. The lower surface of the rotary plate is influenced by the finishing of the rotary plate.
The basic body of the rotary plate is made by casting, e.g. of cast aluminum. The rough lower surface of the rotary plate must subsequently be ground in additional operational steps. After this, the surface was polished to be then eloxated or chromated. This surface treatment of the lower surface was necessary in order to minimize the friction against the fiber sliver filling which presses against it.
Since the cast material contains very small bubbles it may often happen that bubbles are released as the surface is ground off, so that more grinding is necessary. Grinding can often lead to dimensions that fall below tolerance. This means that the rotary plate is rejected. These disadvantages are to be eliminated by the present invention.
OBJECTS AND SUMMARY OF THE INVENTION
It is a principal object of the instant invention to reduce defects in the production of rotary plates. Additional objects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
According to the present invention, a covering is attached to the underside of the rotary plate (i.e. on the side towards the spinning can) to cover the surface of the underside. The covering consists of a cover plate which is presented in a varying state of prefabrication and is to be attached to the rotary plate. The cover plate is circular (a disk) and is flush with the underside of the rotary plate, i.e. it is congruent. In this case threaded bolts are provided on the side of the cover plate towards the rotary plate. The cover plate is screwed to the rotary plate. It is a further characteristic that the cover plate (without threaded bolts) may be glued or otherwise attached to the underside of the rotary plate.
It is yet another characteristic that the cover plate is also circular, but has a slightly greater diameter than the rotary plate. The cover plate is in contact with the rotary plate. The border of the cover plate projecting beyond the rotary plate is angled off and the angled border is caused to engage the ring groove of the rotary plate and is thus attached.
It is a further characteristic of the invention that a prefabricated cover plate is placed on the underside of the rotary plate and is then connected interlockingly with the rotary plate. It is hereby characteristic that the cover plate is already prefabricated with an angled border and is placed on the rotary plate, so that the border is then caused to engage the ring groove of the rotary plate.
The reduction of the manufacturing outlay required in the past due to grinding, polishing and eloxating or chromating of the underside is an advantage of the invention. It is furthermore possible to lower the defects and thus, rejection rate of rotary plates since possible bubbles in the material of the rotary plate are covered up.
The covering can be attached without any restriction to all sizes of rotary plates.
It is a further advantage of the present invention that the possibility of selecting the material of the covering may make it possible to achieve uniformity
REFERENCES:
patent: 3736625 (1973-06-01), Johns
patent: 4646390 (1987-03-01), Bothner
patent: 4905352 (1990-03-01), Gunkinger et al.
patent: 4999883 (1991-03-01), Fritzsche et al.
patent: 5287598 (1994-02-01), Guntler et al.
Crowder Clifford D.
Neas Michael A.
Rieter Ingolstadt Spinnereimaschinenbau AG
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